Tdk Corporation

Mikio Tsuruoka

Shinya Onodera

Hiroki Kitamura

Masayuki Yamashima

Takayuki Mino

A battery pack which includes: a battery cell which contains a non-aqueous electrolyte, wherein the battery cell is a non-aqueous electrolyte secondary battery; a casing which stores the battery cell; and at least one liquid leakage sensor which detects liquid leakage from the battery cell, wherein the casing and/or the battery cell have a leaked liquid retention region in which the non-aqueous electrolyte tends to be retained when the non-aqueous electrolyte leaks out of the battery cell, wherein the liquid leakage sensor outputs measurement information as a detection result without using a charging/discharging circuit which charges and discharges the battery cell, and wherein at least one sensor unit of the liquid leakage sensor is provided in the leaked liquid retention region.

Battery pack

Disclosed herein is a battery that includes a chargeable/dischargeable battery cell and an outer case that houses the battery cell. The outer case having first and second top plates overlapping each other as viewed in a thickness direction thereof. The first top plate has a first convex part and a first concave part having mutually different heights in the thickness direction, the second top plate has a second convex part and a second concave part having mutually different heights in the thickness direction. The first convex part overlaps the second concave part as viewed in the thickness direction, and the second convex part overlaps the first concave part as viewed in the thickness direction.

Battery

An electronic component having an element body having at least one plane, and a terminal electrode to be electrically connected through an electroconductive particle to a circuit substrate. The terminal electrode is formed on the plane of the element body. When the plane of the element body is defined as a reference plane, a ratio of a projected area onto the reference plane of an external surface of the terminal electrode opposed to the circuit substrate in a region where a height of the terminal electrode from the reference plane is not less than a value resulting from subtraction of a diameter of the electroconductive particle from a maximum of the height, to a projected area onto the reference plane of the external surface of the terminal electrode opposed to the circuit substrate is set to be not less than 10%.

Electronic component, production method of electronic component, mounted structure of electronic component, and evaluation method of electronic component

Growing community of inventors

Tokyo, Japan

Mikio Tsuruoka